doc: finish renaming vmh to hsm

Fixed some additional doc references missed in PR #6283

Signed-off-by: David B. Kinder <david.b.kinder@intel.com>

doc/developer-guides/VBSK-analysis.rst

@@ -80,14 +80,14 @@ two parts:  kick overhead and notify overhead.
 -  **Kick Overhead**: The User VM gets trapped when it executes sensitive
    instructions that notify the hypervisor first. The notification is
    assembled into an IOREQ, saved in a shared IO page, and then
-   forwarded to the VHM module by the hypervisor. The VHM notifies its
+   forwarded to the HSM module by the hypervisor. The HSM notifies its
    client for this IOREQ, in this case, the client is the vbs-echo
    backend driver. Kick overhead is defined as the interval from the
    beginning of User VM trap to a specific VBS-K driver, e.g. when
    virtio-echo gets notified.
 -  **Notify Overhead**: After the data in virtqueue being processed by the
-   backend driver, vbs-echo calls the VHM module to inject an interrupt
-   into the frontend. The VHM then uses the hypercall provided by the
+   backend driver, vbs-echo calls the HSM module to inject an interrupt
+   into the frontend. The HSM then uses the hypercall provided by the
    hypervisor, which causes a User VM VMEXIT. The hypervisor finally injects
    an interrupt into the vLAPIC of the User VM and resumes it. The User VM
    therefore receives the interrupt notification.  Notify overhead is

doc/developer-guides/hld/hld-APL_GVT-g.rst

@@ -923,14 +923,14 @@ AcrnGT in Kernel
 =================
 
 The AcrnGT module in the Service VM kernel acts as an adaption layer to connect
-between GVT-g in the i915, the VHM module, and the ACRN-DM user space
+between GVT-g in the i915, the HSM module, and the ACRN-DM user space
 application:
 
 -  AcrnGT module implements the MPT interface of GVT-g to provide
    services to it, including set and unset trap areas, set and unset
    write-protection pages, etc.
 
--  It calls the VHM APIs provided by the ACRN VHM module in the Service VM
+-  It calls the HSM APIs provided by the ACRN HSM module in the Service VM
    kernel, to eventually call into the routines provided by ACRN
    hypervisor through hyper-calls.
 

doc/developer-guides/hld/virtio-net.rst

@@ -193,7 +193,7 @@ example, showing the flow through each layer:
 
 .. code-block:: c
 
-   vhm_intr_handler -->                          // HSM interrupt handler
+   hsm_intr_handler -->                          // HSM interrupt handler
        tasklet_schedule -->
            io_req_tasklet -->
                acrn_ioreq_distribute_request --> // ioreq can't be processed in HSM, forward it to device DM
@@ -348,7 +348,7 @@ cases.)
 
 .. code-block:: c
 
-   vhm_dev_ioctl -->                // process the IOCTL and call hypercall to inject interrupt
+   hsm_dev_ioctl -->                // process the IOCTL and call hypercall to inject interrupt
        hcall_inject_msi -->
 
 **ACRN Hypervisor**